package Filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Author leiHua
 * @Date 2022/10/21 16:11
 */
@WebFilter("/admin/*")
public class ValidationFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        //权限验证
        HttpServletRequest request=(HttpServletRequest)servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;
        if(request.getSession().getAttribute("user")==null){
            //跳转到登录页面
            response.sendRedirect("/lab7_2/login.jsp");
        }
        filterChain.doFilter(request,response);
    }

    @Override
    public void destroy() {

    }
}
